Wind Turbine Blade Deicing Strips With Lower Lightning Risk
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Solution Overview
Problem
Ice accumulation on wind turbine blades in cold-weather climates disrupts airflow, reduces performance, and poses safety hazards, while conductive materials increase the risk of lightning strikes, especially near the blade tip.
Innovation Solution
A wind turbine blade design incorporating carbon-fibre yarn and/or tow heating strips embedded within the shell portions, which generate heat for deicing and provide mechanical strength, with independent control and protection from the environment, reducing the risk of lightning strikes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conductive materials are included in the blade near the outer surface for deicing, then deicing effectiveness is improved, but the risk of lightning strikes increases
Solution Approach 1:
The heating strips are embedded within the shell portions of the blade, nesting the conductive deicing elements inside the composite structure rather than exposing them on the outer surface. This protects the conductive materials from direct lightning exposure while maintaining deicing functionality through thermal conduction to the blade surface.
Solution Approach 2:
The composite material structure acts as an intermediary between the embedded heating strips and the external environment. The heating strips generate heat internally, and this thermal energy is conducted through the composite material to the outer surface, indirectly achieving deicing without exposing conductive materials to the elements.
2Object-affected harmful factors
If heating strips are embedded in the blade shell portions, then lightning strike risk is reduced, but deicing coverage may be limited
Solution Approach 1:
The deicing system is divided into multiple independent heating strips distributed across different shell portions of the blade. Each heating strip can be independently controlled and positioned to target specific high-risk ice accumulation zones, ensuring comprehensive coverage while maintaining the embedded protective structure.
Solution Approach 2:
Heating strips are strategically positioned in shell portions where ice accumulation most critically affects aerodynamic performance. The embedded heating elements provide localized heating precisely where needed, optimizing deicing effectiveness in critical areas while maintaining the protective embedding structure.
3Strength
If carbon-fibre yarn heating strips are used, then mechanical strength is improved, but manufacturing complexity increases
Solution Approach 1:
The heating function and structural reinforcement function are merged into a single component. The carbon-fibre yarn heating strips serve dual purposes: generating heat for deicing and providing mechanical strength to the blade structure. This eliminates the need for separate heating elements and structural reinforcements, simplifying the overall manufacturing process.
Solution Approach 2:
The carbon-fibre yarn heating strips are designed to perform multiple functions simultaneously: electrical heating for deicing, mechanical reinforcement of the blade structure, and integration with the composite material system. This multi-functionality reduces the total number of components and simplifies manufacturing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effective deicing with reduced mechanical stress and power consumption, while minimizing the risk of lightning strikes by embedding heating strips inside the blade and using localized heating based on ice detection, enhancing aerodynamic efficiency and safety.
Implementation Method 1
each heating strip comprising carbon-fibre yarn and/or tow material, and a power source configured to provide electrical power to each heating strip of the first plurality of heating strips in order to generate heating in said each heating strip, said heating being generated by the carbon-fibre yarn and/or tow material
Data Source
Figure 1
Figure 2
Figure 3~4a
AI summary
The present disclosure relates to a wind turbine blade comprising a leading-edge heating element extending along at least a portion of the leading edge of the wind turbine blade, the leading-edge heating element being configured for deicing a corresponding portion of an exterior surface of the leading edge; a first plurality of heating strips, each heating strip of the first plurality of heating strips extending in a substantially spanwise direction of the wind turbine blade, the first plurality of heating strips forming part of a first shell portion of the wind turbine blade, wherein the first shell portion is the pressure side shell portion or the suction side shell portion, the first plurality of heating strips being spaced apart from one another and from the leading-edge heating strip in a chordwise direction, each heating strip having a first end and a second end, the first end being closer to the tip end than the second end, each heating strip comprising carbon-fibre yarn and/or tow material; and a power source configured to provide electrical power to each of the first plurality of heating strips in order to generate heating in said each strip, said heating being generated by the carbon-fibre yarn and/or tow material. A method for manufacturing the wind turbine blade and a method of deicing such a wind turbine blade are also provided. Further, a heating strip is provided.